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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00badc61befc66ad951b21f5098ef82923238bf76111553515b86a1ee1743be3' 
  AND token = 'G0T6RJ4J3ymwESR8x9aO0kndC3lkH/MvyMMzm4PxHdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}